Holder for metal-working machines



M. N. JARVIS.

HOLDER FOR METAL WORKING MACHINES.

APPLICATION FILED JAN. 15, I920.

136L730; v Patented Dec. 7, 1920. I

PATENT OFFICE.

MARSHALL N. JARVIS, OF GILDERSLEEVE, CONNECTICUT.

HOLDER FOR METAL-WORKING MACHINES.

Specification of Letters Patent.

Patented Dec. *7, 1920.

Application filed January 15, 1920. Serial No. 351,690.

To all whom it may concern:

Be it known that I, MARSHALL N. JARVIS, a citizen of the United States, residing at Gildersleeve, in the county of Middlesex and State of Connecticut, have invented cer -tain new and useful Improvements in Holders for Metal-Working Machines, of which the following is a specification.

This invention relates to a holder for metal working machines. The holder as will be inferred can be employed either for holding a tool or work, and itself can be mounted and driven in various ways, being desirably vertically disposed. I have several motives in view among the principal ones being the. provision of means of a simple and effective nature by which power can be properly transferred from oneelement to another of the article. In the drawings accompanying and forming a part of the present specification I have shown in detail a form of embodiment of the invention which to enable those skilled in the art to practice the same will be set forth fully in the following description. I am not restricted to this particular disclosure. I may depart therefrom in several respects within the scope of the invention defined by the claim following said description.

Referring to said drawings:

Figure 1 is an elevation of a holder involving my invention.

Fig. 2 is a practically similar View at right angles to Fig. 1 and with certain of the parts broken away and in section.

Fig. 3 is a sectional elevation of one element of the holder.

Fig. 4' is a bottom plan view of the part appearing in Fig. 3.

Fig. 5 is a top plan view of the other element of the holder.

Fig. 6 is a sectional view of a modification.

Like characters refer to like parts throughout the several views.

The holder ordinarily involves in its makeup main and auxiliary members as 2 and 3 practically of spindle form correlated as I will hereinafter explain. I term these parts 2 and 3 main and auxiliary members not because one is subordinate to the other but more as a matter of convenience more or less common in implements of the same general character. The forward portion or head of the member 2 is practically of cylindrical form and at its rear end there may be fitted as illustrated a collar or ring 5 constituting under normal circumstances a stop. At the front end of the head 4, it is surrounded by a collar or ring 6 which may be driven into place and which as a result is permanently or rigidly connected with the head 4. This collar or ring 6 also constitutes a stop for limiting the motion of a ring, band or collar 7 which has a sliding fit on the cylindrical head 4 between two stop rings 5 and 6. By removing the collar or ring 5 the band or ring 7 may be removed as necessary.

The auxiliary member 3 as shown is in the form of a spindle, the head or front end portion 4 of the main member 2 having a cylindrical socket 8 to receive the rear portion of the auxiliary member or spindle 3.

In the rear portion of the latter is an annular or circumferential channel or groove 9 into which is placed coupling means as I will later explain to couple positively the two members 2 and 3, there being independent means as I will also hereinafter set forth, by which the rotative effect of the member 2 is transferred to the member 3. The socketed head 4 of the main member 2 has through it as shown two diametrically opposite perforations or holes 10 in which 7 are situated spheres or balls 11 constituting suitable coupling members and which are adapted to be projected as I will later explain into the channel or groove 9. In Fig. 3 the collar or band 7 is shown as being in its retracted position by full lines and the balls 11 also by full lines are shown as being out, the balls at this time fitting an annular groove 12 in the front inner portion of the collar or band 7. This permits the free introduction of the spindle 3 into the socket until the groove or channel 9 is in register with the diametrically opposite perforations or holes 10. When this is done the band or collar 7 is advanced to the dotted line position and as it moves forward the band really cams the balls 11 into the groove 12 so that the member 3 will be clutched to the member 2 as shown.

The member 3 is shown provided practically just forward of its center with dia metrically-opposite studs or projections 13 which may be and usually are integral therewith, these studs being adapted to enter seats or apertures as 14 in the front end of the head of the member 2 which position they are shown as occupying in said Fig. 2. Therefore when the studs 13 fit the seats or apertures 14 it will be clear that upon the rotation of the part 2, the part 3 is similarly driven in a positive and certain manner.

The member 3 as shown has near its front portion the flange or collar 15 which may be driven thereonto and which has on its inner side near the central perforation thereof the annular groove 16 in which the pins or studs 13 lie. Concentric with this groove 16 is a second groove 17 also circular and which is intended to accommodate the collar or ring 6 when the member 3 practically bottoms in the socket 8 as shown in Fig. 2.

The main member 2 has an opening 18 leading from the exterior thereof into the socket 8 and through which lubricant such as oil may be fed as required.

In the construction I have already described, the auxiliary member 3 has provision for the connection therewith of a chuck. This auxiliary member with the chuck and the tool can be dismounted while the vertically disposed main member or spindle 2 is rotating with the spindle of a machine-such as a drilling machine, these generally being vertically disposed. A new spindle as 3 can of course be substituted for the one taken off while the spindle of the 7 receive the shank of an implement such as a tap which is held in position by the usual key driven through the keyway 7 lVhat I claim is:

A holder comprising a primary member having a socket, a secondary member fitted removably in the socket of the primary member and having external studs between its ends, the primary member having seats in the forward end of the socket, to removably receive the respective studs, the secondary member having a peripheral groove located in the socket, the socketed portion of the primary member also having a perforation to register with the groove, a ball set into the perforation, anda band to slide on the primary member and provided with means to project the ball into the groove on the movement of the band, the primary member having external rings between which the band slides, the secondary member being provided with a collar to receive the forward of said rings and to also receive said studs.

In testimony whereof I alhx my signature in the presence of two witnesses.

MARSHALL N. JAnvIs.

IVitnesses J. STEWART HALL, C. A. PIoKERING. 

